Rotary cutter



July '1, 1930.

H, H. MANNING "ROTARY CUTTER Filed Jan. 8,- ggs INVENTOR A ORNEY.

a cutter blockor the like may- Patente'd July 1, 1930 'se S HOWARD; .n; 1 MANNING, or mnnnvr I moon CORPORATION,

min, 1 PENNSYLVANIA, 'ASSIGNOR TO JVIGCROSKY or MnAnvInLn, rn-NNsYLvANrA' ROTARY CUTTER Application filed iIanuary 8,,1926. Seria1 No. 80,133. v,

This invention relates to rotary cutters and more particularlyto a floating cutter block for use incon'nection with boring bars,

An important object of this invention is to provide novel means :whereby the cutters of be simultaneously adjustedto a greater cutting diameter' by the turning of a single'adjusting member, this feature providing for the accurate adjustment of theflcutters with respect'to the work and to each other. I

' A further andf'equally important object or the invention i to provide a simple means whereby" the adjustable cutters may securely locked in a fixed position without the necessity of removing the samefrom the'boring bar. f r 7 Other objects and advantages will be apparent during thecourse of the following description: f

In the accompanyingdrawing forming a part of this application vand inwhich like numerals are employed todesignate like parts throughout the same,

Figure 1 is a perspective floating. cutter block applied; Figure 2 is a. tional view throughthe same; I

V Figure-3 is a vertical transverse sectional View taken online13''3 of Figure 2.;

Figure l is,v a group perspective of apair or cutters embodied in'the. invention. "Figure '5 is a detail sectional'view illus-, trat-ing a slight modification of theinvention.

In thefdrawing, wherein for or illustration is shown a preferred embodimerit of the invention, the numeral '5 designates a fiat rectangularbodyhaving a transverse openings for the reception of a taper in or other 'fasteningdevice, by means '0 which the block may be secured in' the slot in a boringba'rB.

Figural illustrates that the body 5 is pro vided in opposite sides thereof with intersectingcommunicating grooves 9 arranged at an anglepf approximately 120 toeacli otherjand adapted tosnugly receive cutters 10 and 11,- the outer ends ofwhich are ground for cutting engagement; with the work.

The inner surface of the'cutter 11 islproset, screw V the screw may f/the improved vertlcal longitudinal sec} forward end of the block the purpose vided with'a diagonal groove 12 for the reception of a tongue 14 on the opposed sur.- faces of the cutter 10. Figure 2 illustrates that the interfitting connection between the blades 10 and 11 extends at right angles'to the axis of the block and when one of the cutters; and more particularly the cutter 11,

is moved. outwardly, the other cutter will also be moved outwardly a similar distance. The outward movement of-the cutters is ac complished by the "turning of an adjusting 18 which, as clearly shown in Figure'Q, is threaded-into an opening 19 in the body. The forward end of the adjusting screw 18is tapered and engagesthe'rounded rear end or the cutter 11 at an anglewith respect thereto so as to bring about the out war l movement of the cutter 11 and'consequently the cutter 10 when the feed screw is moved inwardly. Figure 2 illustrates that the adjusting set screw 18 is provided with a socket forthe reception of one end portion of an L-shaped tool 20, by means of which be either advanced or retracted. I When the cutters have been adjusted the same are, of course, limited in their inward movement by the set screw screws 22 threaded into openingsfld inthe 5; The; inner ends or the set screws 22 may. tact'withthe edges'of the blades.

Inthe operation of. the invention ters are moved inwardly to a cuttingdiameter smaller than that required and they are then moved outwardly through the medium ofthe'adjusting screw 18 to the required cutting diameter whereby play which may be present between the two interlocking cutters is taken up. When adjusted the cutters are, as previously stated, firmly locked in place by the screws-22 and the device isthen ready for use.

the cut- 18 assisted by set a s be tapered for con- I Theimproved floating cutter block maybe easily detached from the boring bar to define the diagonal tongue for the purpose 14, which tongue is flush with the unbroken surfaces of the cutter 10.

In the form of invention illustrated in Figure 5, the bar 25 may be provided with openings or passages 26 intersecting at approximately right angles to each other and receiving blades 27, the outer terminal portions of which are sharpened as indicated at 28'for engagement with the work. In carrying out this form of invention the opposed sides of the blades or cutters 27 are formed with interfitting ribs by means of which the longitudinal movement of one cutter results in the longitudinal movement of the other cutter. This makes it possible to bring about the adjustment of the two cutters simultaneously by the turning of a single nut 30, threaded into one of the openings 26 directly behind and in engagement with one of the cutters.

It is important to note that each cutter may beprovided with a plurality of ribs, as shown in Figure 5, or with a single rib adapted to be received in a groove in the other cutter, it being suflici-ent that the connection between the cutters provides for the simultaneous adjustment of the cutters.

' Having thus .describejdthe invention what is claimed is":

' L A rotary cutter comprising a body having grooves, intersecting cutters in said grooves and havingthe opposed sides there of formed with cooperating motion transmitting means at an angle to the. cutters, and a set screw accessible from one side of the body and engaging the rear end of one of the cutters for simultaneously adjusting both cutters. q V 2 A rotary cutter comprising a body hav ing grooves, intersecting cutters in said grooves and having the opposed sides thereof formed with cooperating motion transmitting means at an'a-ngle to the cutters and imparting the endwise movement of one cutter to the other cutter, and a set screw accessible from one. side of the body and engaging the rear end or" one of the cutters for simultaneously adjusting said cutters, said motion transmitting means comprising an. interfitting driving connection between thecutters. 3. In a boring tool, a body having oblique grooves, intersecting cutters in said grooves, one ofsaid cutters being provided with a dia onal grooveand the other cutter being provided with a motion transmitting tongue received in said diagonal groove, the tongue an groove connection between said cutters forming a means. whereby the cutters are moved together, and an adjustingdevice engaged with the rear end of one of said out,- ters and adapted for simultaneously adjusting the cutters obliquely of the block through the medium ofsaid tongue and groove connection.

4. A floating cutter block for boring bars comprising a body having intersecting grooves, intersecting cutters in said grooves, one of the cutters being provided with a reduced portion having a motion transmitting tongue and the other cutter being provided with a groove receiving said tongue, and an adjustingdevice engaging one of the cutters and being constantly spaced from the other cutter, said interfitting tongue and groove connectionbeing at an angle j ustment of the cutters:

5. Aboring bar comprising a body intersectingcutters carried by the body and having cooperating motion transmitting means forcoextensive adjustment of the cutters diagonally with respect to the body, andan adjusting screw carried by the body and engaged with one of the cutters, the cooperating motiontransmitting means for coextensive diagonal adjustment; of the cutters. constituting thesole means for transmitting ad: justment of said screw to the other cutter.

V 6.. A rotarycutter comprising a body,.cut-- ters carried by the body and, arranged in diagonal, intersecting relation to each other and having cooperating driving means, for simultaneous and consonantadjustment of the cutters with respect to-the body, and; an adjiust ing device carried by the body and having connection with one-oi: said cutters and being spaced fromthe other cutter.

7. A rotary cutting tool comprising abody, intersecting cutters carried by the body, and an adjusting device engaged. Withone of the cutters to move the same ing constantly spaced from the other cutter, theopposed sides of the cutters being provided' with cooperating motion transmitting means imparting the; movement of one cutter to the? other cutter.

ing provided with mutually cooperating motion transmitting means extending'at an an gle to the line of adjustment of the cutters and imparting the lengthwise movement of one cutter, to the other cutter.

' In a rotary cutter, abody having; slots, cuttersamo-vable endwise in said slotsand having intersecting portions provided with cooperating motion transmittin means at an angle to the cutters to the ot her simultaneous adjustment of the. vicebei-ng cutter. I j j 10. Ina rotary cutter, a body having slots, cutter movable end'wise insaid slots. and haV- ing intersecting portions; providedv with matually coacting motion cutters,

to the line of ad lengthwise; and bee lengthwise v transmitting means said adjustingdeconstantly spaced from the other extending at an angle to the cutters and imparting endwise movement of one of the cutters to the other cutter, and an adjusting device carried by the body and engaged Withthe rear portion of one of the cutters and being free from direct connection with the other e cutter, said cooperating motion transmitting means being extended substantially at right angles to the axis of the body. 11. In a rotary cutter, a body having oblique grooves, cutters in the grooves and having mutually intersecting portions, means to efiect movement of one of the cutters in its respective groove, and coacting means upon the said intersecting portions of the cutters for effecting simultaneous and consonant movement of the other cutter in its respective groove upon adjustment of the first mens tioned cutter. no In testimony whereof I aflix my signature.

7 HOWARD H. MANNING. 

